Measurement of the cross section of e+e-→Ξ-Ξ+ at center-of-mass energies between 3.510 and 4.843 GeV

作者：Ablikim, M.; Achasov, M. N.; Adlarson, P.; Ai, X. C.; Aliberti, R.; Amoroso, A.; An, M. R.; An, Q.; Bai, Y.; Bakina, O.; Balossino, I.; Ban, Y.; Batozskaya, V.; Begzsuren, K.; Berger, N.; Berlowski, M.; Bertani, M.; Bettoni, D.; Bianchi, F.; Bianco, E.; Bortone, A.; Boyko, I.; Briere, R. A.; Brueggemann, A.; Cai, H.; Cai, X.; Calcaterra, A.; Cao, G. F.; Cao, N.; Cetin, S. A.; Chang, J. F.; Chang, T. T.; Chang, W. L.; Che, G. R.; Chelkov, G.; Chen, C.; Chen, Chao; Chen, G.; Chen, H. S.

来源：JOURNAL OF HIGH ENERGY PHYSICS, 2023, (11): 228.

DOI：10.1007/JHEP11(2023)228

• e(+)-e(-) Experiments
• Branching fraction
• QCD
• Electroweak Interaction

Using e(+)e(-) collision data corresponding to a total integrated luminosity of 12.9 fb(-1) collected with the BESIII detector at the BEPCII collider, the exclusive Born cross sections and the effective form factors of the reaction e(+)e(-)->Xi(-)Xi(+) are measured via the single baryon-tag method at 23 center-of-mass energies between 3.510 and 4.843 GeV. Evidence for the decay psi(3770)->Xi(-)Xi(+) is observed with a significance of 4.5 sigma by analyzing the measured cross sections together with earlier BESIII results. For the other charmonium(-like) states psi(4040), psi(4160), Y(4230), Y(4360), psi(4415), and Y(4660), no significant signal of their decay to Xi(-)Xi(+) is found. For these states, upper limits of the products of the branching fraction and the electronic partial width at the 90% confidence level are provided.